http://www.perlmonks.org?node_id=1050254


in reply to Expect for cryptsetup

Do you really want/need to use Expect? Because that seems very complicated a solution, to me. There is certainly an option for cryptsetup that allows you to provide the passphrase on command-line or in a file.

I've just looked at the cryptsetup man page, and I see there is a --key-file option.